Struct hecs_schedule::QueryOne

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pub struct QueryOne<'a, Q: Query> { /* private fields */ }

Expand description

Wraps the bulting QueryOne with a Result containing the entity and component instead of option

Implementations

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impl<'a, Q: Query> QueryOne<'a, Q>

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pub fn get(&mut self) -> Result<QueryItem<'_, Q>>

Get the query result, or return an error if the entity does not satisfy the query

Must be called at most once.

Panics if called more than once or if it would construct a borrow that clashes with another pre-existing borrow.

Auto Trait Implementations

impl<'a, Q> RefUnwindSafe for QueryOne<'a, Q> where
Q: RefUnwindSafe,

impl<'a, Q> Send for QueryOne<'a, Q>

impl<'a, Q> Sync for QueryOne<'a, Q>

impl<'a, Q> Unpin for QueryOne<'a, Q> where
Q: Unpin,

impl<'a, Q> UnwindSafe for QueryOne<'a, Q> where
Q: UnwindSafe,

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::()

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

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Struct hecs_schedule::QueryOne

Implementations

impl<'a, Q: Query> QueryOne<'a, Q>

pub fn get(&mut self) -> Result<QueryItem<'_, Q>>

Auto Trait Implementations

impl<'a, Q> RefUnwindSafe for QueryOne<'a, Q> where
Q: RefUnwindSafe,

impl<'a, Q> Send for QueryOne<'a, Q>

impl<'a, Q> Sync for QueryOne<'a, Q>

impl<'a, Q> Unpin for QueryOne<'a, Q> where
Q: Unpin,

impl<'a, Q> UnwindSafe for QueryOne<'a, Q> where
Q: UnwindSafe,

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where
T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where
T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where
U: From<T>,

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::()

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<T> Component for T where
T: 'static + Send + Sync,

Struct hecs_schedule::QueryOne

Implementations

impl<'a, Q: Query> QueryOne<'a, Q>

pub fn get(&mut self) -> Result<QueryItem<'_, Q>>

Auto Trait Implementations

impl<'a, Q> RefUnwindSafe for QueryOne<'a, Q> where Q: RefUnwindSafe,

impl<'a, Q> Send for QueryOne<'a, Q>

impl<'a, Q> Sync for QueryOne<'a, Q>

impl<'a, Q> Unpin for QueryOne<'a, Q> where Q: Unpin,

impl<'a, Q> UnwindSafe for QueryOne<'a, Q> where Q: UnwindSafe,

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::()

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<T> Component for T where T: 'static + Send + Sync,

impl<'a, Q> RefUnwindSafe for QueryOne<'a, Q> where
Q: RefUnwindSafe,

impl<'a, Q> Unpin for QueryOne<'a, Q> where
Q: Unpin,

impl<'a, Q> UnwindSafe for QueryOne<'a, Q> where
Q: UnwindSafe,

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

impl<T> Component for T where
T: 'static + Send + Sync,